OBSERVER EFFECT - Edge of the Earth

Part one of four.

You make your way down that old familiar hallway and step into that old familiar elevator. But something is off. Instead of the elevator taking you down to the parking garage, you step out inside a castle torn from its earthly roots.

Now you make your way through these worlds, each stranger than the last, unstuck in time and space.

What is the Observer?
Who occupy these worlds?
Did you actually leave the elevator?